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# functions

## Name

functions --

## Synopsis

    #define     XSLT_REGISTER_FUNCTION_LOOKUP   (ctxt)
    xmlXPathFunction xsltXPathFunctionLookup    (xmlXPathContextPtr ctxt,
                                                 const xmlChar *name,
                                                 const xmlChar *ns_uri);
    void        xsltDocumentFunction            (xmlXPathParserContextPtr ctxt,
                                                 int nargs);
    void        xsltKeyFunction                 (xmlXPathParserContextPtr ctxt,
                                                 int nargs);
    void        xsltUnparsedEntityURIFunction   (xmlXPathParserContextPtr ctxt,
                                                 int nargs);
    void        xsltFormatNumberFunction        (xmlXPathParserContextPtr ctxt,
                                                 int nargs);
    void        xsltGenerateIdFunction          (xmlXPathParserContextPtr ctxt,
                                                 int nargs);
    void        xsltSystemPropertyFunction      (xmlXPathParserContextPtr ctxt,
                                                 int nargs);
    void        xsltElementAvailableFunction    (xmlXPathParserContextPtr ctxt,
                                                 int nargs);
    void        xsltFunctionAvailableFunction   (xmlXPathParserContextPtr ctxt,
                                                 int nargs);
    void        xsltRegisterAllFunctions        (xmlXPathContextPtr ctxt);

## Description

## Details

### XSLT_REGISTER_FUNCTION_LOOKUP()

    #define     XSLT_REGISTER_FUNCTION_LOOKUP(ctxt)

Registering macro, not general purpose at all but used in different modules.

`ctxt` : |

### xsltXPathFunctionLookup ()

    xmlXPathFunction xsltXPathFunctionLookup    (xmlXPathContextPtr ctxt,
                                                 const xmlChar *name,
                                                 const xmlChar *ns_uri);

This is the entry point when a function is needed by the XPath interpretor.

`ctxt` : | a void * but the XSLT transformation context actually
`name` : | the function name
`ns_uri` : | the function namespace URI
Returns : | the callback function or NULL if not found

### xsltDocumentFunction ()

    void        xsltDocumentFunction            (xmlXPathParserContextPtr ctxt,
                                                 int nargs);

Implement the document() XSLT function node-set document(object, node-set?)

`ctxt` : | the XPath Parser context
`nargs` : | the number of arguments

### xsltKeyFunction ()

    void        xsltKeyFunction                 (xmlXPathParserContextPtr ctxt,
                                                 int nargs);

Implement the key() XSLT function node-set key(string, object)

`ctxt` : | the XPath Parser context
`nargs` : | the number of arguments

### xsltUnparsedEntityURIFunction ()

    void        xsltUnparsedEntityURIFunction   (xmlXPathParserContextPtr ctxt,
                                                 int nargs);

Implement the unparsed-entity-uri() XSLT function string unparsed-entity-uri(string)

`ctxt` : | the XPath Parser context
`nargs` : | the number of arguments

### xsltFormatNumberFunction ()

    void        xsltFormatNumberFunction        (xmlXPathParserContextPtr ctxt,
                                                 int nargs);

Implement the format-number() XSLT function string format-number(number, string, string?)

`ctxt` : | the XPath Parser context
`nargs` : | the number of arguments

### xsltGenerateIdFunction ()

    void        xsltGenerateIdFunction          (xmlXPathParserContextPtr ctxt,
                                                 int nargs);

Implement the generate-id() XSLT function string generate-id(node-set?)

`ctxt` : | the XPath Parser context
`nargs` : | the number of arguments

### xsltSystemPropertyFunction ()

    void        xsltSystemPropertyFunction      (xmlXPathParserContextPtr ctxt,
                                                 int nargs);

Implement the system-property() XSLT function object system-property(string)

`ctxt` : | the XPath Parser context
`nargs` : | the number of arguments

### xsltElementAvailableFunction ()

    void        xsltElementAvailableFunction    (xmlXPathParserContextPtr ctxt,
                                                 int nargs);

Implement the element-available() XSLT function boolean element-available(string)

`ctxt` : | the XPath Parser context
`nargs` : | the number of arguments

### xsltFunctionAvailableFunction ()

    void        xsltFunctionAvailableFunction   (xmlXPathParserContextPtr ctxt,
                                                 int nargs);

Implement the function-available() XSLT function boolean function-available(string)

`ctxt` : | the XPath Parser context
`nargs` : | the number of arguments

### xsltRegisterAllFunctions ()

    void        xsltRegisterAllFunctions        (xmlXPathContextPtr ctxt);

Registers all default XSLT functions in this context

`ctxt` : | the XPath context

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